The recent WannaCry and Nyetya events are excellent examples of this. Talos is racing the clock to get accurate, impactful, and actionable information. It is necessary for us to talk about something when we arent 100% certain we are correct. As we move ahead, when Talos communicates doubt, we will do so using the following as guidance as guidance:Estimated % Confidence / Possible / Unlikely/ Unlikely / Probable / Likely / Highly Likely.”]
Source: https://blog.talosintelligence.com/2017/08/on-conveying-doubt.html